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EXCEL 10 W7761A INPUT/OUTPUT DEVICE
29 74-2699
12345678
E-BUS
24 VAC
W7761A
REMOTE I/O
DEVICE
1
2
1
2
EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.
USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM
2
)
WITH A MINIMUM OF 18 AWG (1.O MM
2
), FOR EARTH GROUND WIRE.
TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED
TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.
E-BUS
E GND
GND
GND
GND
NOT USED
NOT USED
AI-1 OHM
AI-2 OHM
9 101112 14 J315
31 30 29 28 27 26 25 24 23 22 21 20
24 VAC COM
E-BUS
JACK
22 VDC OUT
19 18 17 16
AI-3 OHM
AI-4 OHM
AI-6 V/mA
OUT 7
OUT 6
OUT 5
OUT 4
OUT 8
OUT 1
OUT 3
OUT 2
AI-5 V/mA
13
DI-2
DI-4
DI-1
DI-3
M15279
GND
GND
TRIAC EQUIVALENT CIRCUIT
24 VAC
+
-
24 (H)
24 (N)
PWM
(H 24 VAC)
PWM OUTPUT
FROM CNTRL
ML7984B
T6 T5 C B W R
PWM
VALVE ACTUATOR
FAN
CONTACTOR (24 VAC)
LINE POWER
Fig. 19. Typical PWM Valve Actuator and miscellaneous fan control to W7761A. (For note 2, refer to Fig. 15.)